Onna vs Exterro vs Z-Discovery Comparison
Onna
Starting at Contact for pricing
- Free Trial
- Large Enterprises
- Medium Business
Onna's powerful eDiscovery software makes it easy to sort and pinpoint relevant information from large data sets. The platform is used by law firms, corporations, government agencies, and educational institutions to mana…
Exterro
Starting at Contact for pricing
- Large Enterprises
- Medium Business
Exterro's eDiscovery Assistant is a highly intuitive and feature-rich enterprise-class eDiscovery software specifically designed to support a wide range of users while minimizing IT involvement. It helps legal department…
Z-Discovery
Starting at Contact for pricing
- Large Enterprises
- Medium Business
The Z-DISCOVERY is an eDiscovery application offers robust functionality available. Built for a small office or to handle unlimited data, it is completely scalable and provides control over searchable documents, metadata…
Exterro leads on user satisfaction with a 4.3-star rating across 99 reviews.
Onna vs Exterro vs Z-Discovery — at a glance
| Feature | Onna | Exterro | Z-Discovery |
|---|---|---|---|
| Rating | 4.0 / 5 | 4.3 / 5 | 4.4 / 5 |
| Reviews | 1 | 99 | 93 |
| Starting price | Contact for pricing | Contact for pricing | Contact for pricing |
| Free trial | Yes | No | No |
| Free version | No | No | No |
| Best for | Large Enterprises, Medium Business, Small Business | Large Enterprises, Medium Business, Small Business | Large Enterprises, Medium Business |
| Category | eDiscovery Software | eDiscovery Software | eDiscovery Software |
| Platforms | SaaS/Web/Cloud, Installed - Windows, Installed - Mac | SaaS/Web/Cloud, Installed - Windows, Installed - Mac | SaaS/Web/Cloud |
| API | Available | — | Available |
| Support modes | Business Hours, Online | 24/7 (Live rep), Business Hours | 24/7 (Live rep), Business Hours |
| Certifications | SOC 2, HIPAA, GDPR, ISO 27001 | SOC 2, HIPAA, GDPR, ISO 27001 | — |
| Data residency | US | US | US |
Key differences between Onna and Exterro
- Free trial: Onna offers a free trial; Exterro does not.
- User satisfaction: Exterro scores higher with a 4.3-star average.
- Deployment: Onna supports SaaS/Web/Cloud, Installed - Windows, Installed - Mac; Exterro supports SaaS/Web/Cloud, Installed - Windows, Installed - Mac.
Compare Onna vs Exterro vs Z-Discovery — and walk away knowing which one fits.
Which tool fits your team best
Which is actually cheaper for your team size
Where each product wins, per real buyers
Most eDiscovery Software tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.
Biggest differences
Features
Pricing
Buying details
Security
Buyer feedback
Integrations
Product tour
Other options
Free PDF comparison
Download this Onna vs Exterro vs Z-Discovery comparison
Get the full side-by-side as a PDF — these picks plus the top eDiscovery Software tools, with verified ratings, pricing and features.
- Side-by-side on pricing, features & ratings
- Plus the category top 10, scored & ranked
- Emailed to you — no on-screen download
No file downloads on screen — we email it to you. One-click unsubscribe anytime.
Biggest differences
Start here before you go deeper into features.
Best for legal teams needing advanced eDiscovery with strong data integration.
- You require comprehensive data integration from multiple diverse sources.
- Your team needs advanced search and in-depth data analysis capabilities.
- Data security and regulatory compliance are top priorities for your organization.
- Your team lacks dedicated support to onboard and manage complex features.
- You need extensive third-party app integrations beyond Onna’s limited marketplace.
Best for enterprise legal teams needing powerful, customizable eDiscovery workflows.
- You require comprehensive legal hold processes including employee change monitoring.
- Your team values strong vendor collaboration and responsive customer support.
- You need an intuitive, web-based interface with flexible, configurable workflows.
- You are a small business with minimal legal hold needs.
- You need extensive out-of-the-box integrations with systems like Outlook.
Best for scalable eDiscovery with strong legal hold and support.
- You need to manage large or unlimited data volumes efficiently.
- Your legal or compliance team requires an intuitive, easy-to-use interface.
- You value responsive customer support and collaborative feature development.
- Your team demands highly flexible and customizable reporting options.
- You require seamless integration with tools like Outlook or advanced interview modules.
Onna: Best for legal teams needing advanced eDiscovery with strong data integration. Exterro: Best for enterprise legal teams needing powerful, customizable eDiscovery workflows.
Description | Onna's powerful eDiscovery software makes it easy to sort and pinpoint relevant information from large data sets. The platform is used by law firms, corporations, government agencies, and ... Read More about Onna | Exterro's eDiscovery Assistant is a highly intuitive and feature-rich enterprise-class eDiscovery software specifically designed to support a wide range of users while minimizing IT ... Read More about Exterro | The Z-DISCOVERY is an eDiscovery application offers robust functionality available. Built for a small office or to handle unlimited data, it is completely scalable and provides control over ... Read More about Z-Discovery |
|---|---|---|---|
Free Trial Availability |
|
|
|
Spotsaas ScoreWhat's this? ↗ | 8.3/10 | 9.6/10 | 8.0/10 |
User RatingsBased on verified Spotsaas reviews | |||
Best Company Size | Medium BusinessLarge Enterprises | 51-500 employees500+ employees | 51-500 employees500+ employees |
Get pricing help | Get pricing help | Get pricing help |
Software Demo
Demo |  Exterro has not given any software demo yet If you're the owner of this profile, add your demo.Contact us | Z-Discovery has not given any software demo yet If you're the owner of this profile, add your demo.Contact us |
|---|
Need a second opinion?
Get shortlist help from a software advisor
Share your priorities, budget, and team needs, and we’ll help you narrow the options and understand the tradeoffs before you talk to vendors.
- Independent advice — matched to your business
- Understand the tradeoffs before you talk to vendors
- Free 15-min call with a software advisor.
Step 1 of 4
How big is your team?
We tailor recommendations to companies your size.
How do Onna, Exterro and Z-Discovery Compare on Features?
Total Features | 7 Features | 9 Features | 6 Features |
|---|---|---|---|
Unique Features | No unique features | No unique features | No unique features |
Get Quote | Get Quote | Get Quote |
Compare Onna, Exterro and Z-Discovery on pricing
Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.
Pricing Option | |||
|---|---|---|---|
Pricing Plans |
|
|
|
Pricing Page | Pricing information not available | Pricing information not available |  |
Other Details
Organization Types supported |
|
|
|
|---|---|---|---|
Platforms Supported |
|
|
|
Modes of support |
|
|
|
API Support |
|
|
|
Get help choosing | Get help choosing | Get help choosing |
Security & Compliance
Certifications, data handling, and security controls for IT and compliance evaluators.
SOC 2 | ✓ Yes | ✓ Yes | — |
|---|---|---|---|
HIPAA | ✓ Yes | ✓ Yes | — |
GDPR | ✓ Yes | ✓ Yes | — |
ISO 27001 | ✓ Yes | ✓ Yes | — |
Single Sign-On (SSO) | ✓ Yes | ✓ Yes | — |
Multi-Factor Auth (MFA) | ✓ Yes | ✓ Yes | — |
Data Encryption | ✓ Yes | ✓ Yes | — |
Audit Logs | ✓ Yes | ✓ Yes | — |
Data Residency | 🇺🇸 US | 🇺🇸 US | 🇺🇸 US |
Onna vs Exterro User Reviews & Rating Comparison
User Ratings | |||
|---|---|---|---|
Rating Distribution | |||
Spotsaas Editor’s POV generated by AI | Buyer sentiment Users generally appreciate Onna's powerful data integration and search capabilities, though some find the feature set complex and the marketplace limited. What buyers like
Common complaints
| Buyer sentiment Users generally praise Exterro for its powerful legal hold capabilities, excellent customer support, and intuitive UI, though some find the complexity and integration limitations challenging. What buyers like
Common complaints
| Buyer sentiment Users generally praise Z-Discovery for its efficient legal hold process, strong customer support, and intuitive UI, though some find certain features clunky and desire more flexible reporting. What buyers like
Common complaints
|
Pros and Cons |
|
|
|
Positive Reviews | No reviews available for the product | No reviews available for the product | No reviews available for the product |
Media and Screenshots
Screenshots |  7 Screenshots |  6 Screenshots |  20 Screenshots |
|---|---|---|---|
Videos |  3 Videos | No videos available. | No videos available. |
Alternatives
Alternatives |
|---|
Add another option to compare side by side
Search by product name to compare pricing, fit, and buyer feedback in one view.Compare similar software options
Related Blogs and Articles for Ediscovery Software
Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].
Frequently asked questions
- Which is better, Onna or Exterro?
- Exterro edges out the other on user ratings (4.3 vs 4.0). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
- Do Onna and Exterro offer a free trial?
- Onna offers a free trial. Exterro does not.
- What is the starting price of Onna vs Exterro?
- Onna starts at Contact for pricing. Exterro starts at Contact for pricing.
- What are the top alternatives to Onna?
- Top alternatives to Onna include Logikcull, Relativity, CasePoint, Cavo eD, Catalyst Insight.
- What are the top alternatives to Exterro?
- Top alternatives to Exterro include AdaptiveGRC, LexComply, Logikcull, Relativity, Reprise.